In EnglishA little history first:Red has always been a very desirable and difficult color to get and besides madder, dyers have been able to get red from different scale insects.Dyer's kermes (Kermes vermilio) is an insect which lives as a parasite on kermes oak (Quercus coccifera). Nowadays Dyer's kermes is threatened species, most important reasons for this are shrinking of natural habitats of kermes oak, pestisides and forest fires, and so it is advisable not to use kermes any more. The main colorant in Dyer's kermes is kermesic acid and it gives scarlet red.

In an area from Middle and North Europe to Mongolia, several species of scale insects belonging to Porphyrophora-genus are found and they give crimson red. The insects live underground in the roots of several perennial plants (P.polonica "Polish crimson-dyeing scale insect" and P.hamelii "Armenian crimson-dyeing scale insect"). Some of these insects are also now almost extinct, because of the extension of agriculture and pesticides, for example one species which live on the roots of wheat. The colorants in these species are carminic acid, kermesic acid, flavokermesic acid and they have been used to dye silk crimson in medieval Venice.One host of P.polonica is Scleranthus perennis, I had to look it up in Finnish plant book, and to my surprise it is common in Finland, too. I will have to try to find and to identify it next summer, who knows what might live in it's roots.. or perhaps nothing:)The most important dye insect is Domestic cochineal (Dactylopius coccus), which was brought dried to Europe from Mexico by the Spanish in the 16th century. Cochineal lives in Opuntia cactuses in Mexico and South America, and it was cultivated in Mexico even before the Spanish got there. Dactylopius- genus includes several wild species, which contain the same colorant, but the cultivated form gives bigger crops.It is no wonder the Europeans were excited about the American cochineal; to dye with Dyer's kermes they needed at least 71,5% more than the weight of the fiber, and 6-14 times more of the crimson-dyeing scale insects than fiber, when with cochineal only 7% was needed to dye the same depth of color (Cardon), the hue was a little different but nevetherless, it was much more economical to dye with cochineal. The fiber was mordanted with alum and red tartar (from the barrels of red wine) and later in the 18th century tin and white tartar (from the barrels of white wine), I started thinking what is this synthetic cream of tartar used now, and why did it have to be red tartar with alum in old recipes instead of white? (Cardon p.626 and Sandberg p.54)

At first cochineal was brought dried to Europe (it was a big secret where it came from), and it was the most precious product after gold, silver and pearls. By the 1800 there were several attempts to grow cochineal in Europe and even though they managed to grow the Opuntia cactus, the scale insects were not so easy to grow. It was as late as in 1836 when the cultivation of cochineal in the Canary Islands succeeded in larger scale.

Here is a nice slideshow about dyeing with cochineal in Oaxaca Mexico and here a YouTube video (in Spanish, in left side of the page) from Canary islands, about collecting cochineal and dyeing with it.In Gösta Sandberg's book The Red Dyes, there was a funny story about Swedish botanist Linne, who wanted very much to get this new dye insect, cochineal, and he sent one of his students, Daniel Rolander, to South America to get it in 1755. A year later a shipment arrived to Sweden from Daniel, a big Opuntia cactus in a pot. When it reached Upsala, it was taken to botanical garden, where a gardener discovered that the plant was full of "vermins", so of course he washed it very throughly to get rid of them.. before Linne had a chance to come and see the plant. You can imagine how Linne felt when he came to see the longed-for insects. He found one insect which had survived the washing, but it wasn't a pregnant female and it died! Linne was devastated and got a migraine, but the story doesn't tell what happened to the unfortunate gardener.

Well, as the synthetic dyes came along in the end of the 19th century, the cultivation of cochineal collapsed, but they are still cultivated in Peru, Chile, Canary Islands and Bolivia, mainly for the food coloring. Cochineal gives reds and purples/pinks, and the main colorants are carminic acid, kermesic acid, flavokermesic acid and these belong to anthraquinone group, the same group which includes colorants of madder and Dermocybe mushrooms, and they are very fast. Cochineal also contains small amounts of still unknown colorants. A Russian chemist Valery Kolikov has studied cochineal lately, but I didn't find any of his studies in the Internet, only in a magazine Dyes in History and Archaeology vol 16/17, and I don't have it. I don't know if it would be available in any library in Finland, I'll have to find out:).

As with other natural dyes, the time and temperature of the dyebath affect on the ratio of the different colorants absorbed, the kermesic acid and flavokermesic acid are absorbed first.There are many recipes for dyeing with cochineal, and this next one is the one I use, the picture in the middle above. It is based on a recipe in Terttu Hassi's dyebook Luonnonväreillä värjääminen, and I have modified it over the time to suit myself. I get different colors with the same recipe by changing the color of the base yarn, and dyeing over oranges first dyed with madder or mushrooms, or over blues to get purples. I haven't used acid or basic modifiers after dyeing, because I am not sure if the modified colors stay (perhaps they do, I don't know, because I don't have experience on it, so I do what I know will work) when my customers wash the yarns/garments with recommended neutral detergent, but if you dye for your own projects, you can find many recipes where the color is changed by the pH of the dyebath.

DYEING WITH COCHINEAL1. Measure 8grams of cochineal /100grams of fiber (8%), cover with hot water and wait overnight. With this amount you can get quite dark color, and if you want lighter, you can reduce the amount of cochineal.I use whole cochineal bugs, because for me the ground powder is next to impossible to get off the dyed wool yarns. This is a personal preference and for me this is by far the easiest way to dye.2. Boil the soaked cochineal in a small kettle in the same water for 20 minutes, than strain the bath (keep the strained liquid), cover with fresh water and boil again for another 20 minutes. I have noticed that I get more color this way than when boiling in only one water.3. In the end the second extraction, add 4 grams of Cream of tartar/8grams of cochineal to the boiling bath.4. Next combine the extractions in a bigger kettle with more fresh water, you should have total of 5 litres of water/100grams of yarn.5. Heat the bath and when it is lukewarm, add well soaked and premordanted (10% alum, 4%CoT) yarns. If you don't use CoT when mordating (or use different amount), the shade of the color will be a little different.6. Raise the temperature of the bath to simmer, 80-90C, and keep it for one hour. Unlike dyeing with madder, the cochineal bath needs to be almost boiling (but of course not quite, so that the yarn won't get damaged). You can take the yarns way from the bath after one hour, cochineal doesn't benefit so much from cooling in the bath as many other natural dyes, but of course it doesn't hurt it.7. Leave the dyed yarns to set in the air overnight or for several days, before washing them. I have found that this helps the dye to sit even tighter in the yarn and there will not be hardly any color coming away when you wash the yarns.8. Wash the dyed yarns, and I alwys add a glug of vinegar to the last rinse. This doesn't change the color, but at least it will close the wool scales and hopefully even makes the dye faster (this advise is from Swedish dyebook by Erik Sundström).9. Pieces of cochineal are easy to get off the dry yarn, unlike the powder.10. There is still a lot of color left in the dyebath and you can dye the same amount of yarn as in the first bath. Put the premordanted yarns to the cool bath and heat and dye like before.

The original 8grams will dye 200grams of yarn, first one skein darker color and then another lighter color. I don't usually use the same bath for the third time, firstly you can see, when the bath is exhausted and often the third color is not so lightfast as the first ones.When you use the premordanted yarn, most of the color goes to the yarn, but if you put the mordants to the cochineal bath, some of the color attaches only to the mordant and not to the yarn, and stays in the bottom of the bath. So by using the premordanted yarn, you can save mordants and dyestuffs and get a stronger color.The function of the Cream of Tartar in the dyebath is that it acts as an assist and keeps the dyemolecules soluble longer and helps them attach to the yarn (Sandberg).Also in Cardon (p.629) there is a piece about Golikov's studies where the addition of CoT (and/or gallnuts.. hmm.. tannins??, like in some 19th century recipes) prevents the formation of undesirable insoluble products from reactions between carminic acid and impurities in the water. Whatever the reason, adding CoT to the bath helps exhausting the bath in my experience, too:)

Thank you Leena - it is very interssting to hear using cochineal not having been groud before deying! I also don't like it ;-).Now I know what to do with the rest of cocheneal and which colours will be mine this year.

You are impressively knowledgeable. I learn so many interesting facts and procedures from you and your various experiments. Your reds are beautiful -- both in the photos and in person. Thank you for all you share with us!

Thank you for the excellent instructions. Dyed with Cochineal for the first time and got some amazing colors. Was able to use the Cochineal more than 3 extractions for more great color without crushing the bugs. Thanks again for sharing.Justine in still snowy Montana USA

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WHY USE NATURAL DYES

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